So yesterday I committed cardinal sin - I bought a used lens without checking it thoroughly enough.
It was a Tokina 28-80mm f/2.8
Looked great, popped it on my D7k and took some test shots (in daylight) and it focused well and sharp. Had a Hoya filter on it too. I was on the way home from the store, with popsicles in the back seat. Had to be quick.
Took it home for just under $400.
Later, I put on the hood to go outside and shoot and....it fell off. Along with the entire filter ring and filter. The entire front of the lens just dropped on the floor. The ring was broken where it screws into the main body.
Well maybe I can glue it...
So I took some more shots indoors near a window...and they were soft. Like, WAY soft. Vaseline on the lens soft. WTF?
Took a flashlight to it and way deep in the middle element - fungus. An even, thorough deposit of fungus. I missed it by only checking the front and rear elements in the daylight. This was deep down, in a long lens. Only visible by flashlight inspection.
Luckily the guy I got it from was local and understanding, so he took it back and refunded my money.
Moral of the story: CHECK THE LENS, even if you are in a hurry like I was.
Got a used lens horror story? Let's hear it!